ASSESSING THE BORDER: TESTS OF THE LAW OF ONE PRICE IN CANADA AND THE U.S.

This paper investigates the role of the border in Canadian and U.S. prices, based on a sample of highly disaggregated city-level retail prices. It finds substantial short-run differences in cross-border prices. While most of these are eliminated over time, long-run differences in the cross-border prices remain. These long-run cross-border differences average just over 20%, compared to mean long-run intranational price gaps of 7–9%. Short-run price differences are eliminated at similar rates in the cross-border and intranational data. Evidence from national average prices suggests the gap between cross-border prices has not narrowed during the recent depreciation of the Canadian dollar.